/*
* Copyright (c) 2009 Aricent and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Aricent - initial contribution.
*
* Contributors:
*
* Description:
* Plugin class for AmrNb encoder. This class inherits CMMFCodec
* class and implements the pure virtual functions of CMMFCodec.
* The class also has a few private funtions.
*
*/

#ifndef ARIAMRNBENCMMFCODEC_H
#define ARIAMRNBENCMMFCODEC_H

#include <mmfcodec.h>

//Class to hold encoding parameters
class TAmrNbEncParam
    {
public:
    //encoding mode to specify bitrate(takes values 0 to 7)
    TInt16	iMode;
    //discontinuous transmission flag(1-true/0-false)
    TInt16  iDtx;
    //type of file(0-RTP/1-3GPP);need not be set(By default-RTP)
    TInt16	iFileFormat;
    };

//Forward Declaration
class CAriAmrNbEncWrapper;

// Class declaration
class CAriAmrNbEncMmfCodec:public CMMFCodec
    {
public: //constructors and destructors
    /**
     * Two-phased constructor.
     * @return pointer to an instance of CMMFCodec
     */
	static CMMFCodec* NewL();

	/**> Destructor */
	~CAriAmrNbEncMmfCodec();

public: // From CMMFCodec

    /**
     * From CMMFCodec
     * Sets codec configuration.
     * The configuration data is passed in as a descriptor of type TDesC8.
     * @param aConfigType
     * The UID of the configuration data.
     * @param aParam
     * Descriptor with frame info parameters in the form of RArray
     */
    virtual void ConfigureL( TUid aConfigType, const TDesC8& aParam );

    /**
     * From CMMFCodec
     * Codec reset function used to flush out status information when a
      * reposition occurs.
     * This is used if the codec requires resetting prior to use.
     */
    virtual void ResetL();

    /**
     * From CMMFCodec
     * Processes the data in the specified source buffer and writes the
     * processed data to the specified destination buffer.
     * This function is synchronous, when the function returns the data
     * has been processed. The source buffer is converted to the appropriate
     * coding type in the destination buffer. The buffers can be of any size,
     * therefore there is no guarantee that all the source buffer can be
     * processed to fill the destination buffer or that all the source buffer
     * may be processed before the destination is full. This function
     * therefore returns the number of source, and destination, bytes
     * processed along with a process result code indicating completion
     * status. This function is synchronous, when the function returns the
     * data has been processed. The source buffer is converted to the
     * appropriate coding type in the destination buffer. The buffers can be
     * of any size, therefore there is no guarantee that all the source buffer
     * can be processed to fill the destination buffer or that all the source
     * buffer may be processed before the destination is full. This function
     * therefore returns the number of source, and destination, bytes
     * processed along with a process result code indicating completion
     * status. The aSource and aSink buffers passed in are derived from
     * CMMFBuffer. The buffer type (e.g. a CMMFDataBuffer) passed in should be
     * supported by the codec otherwise this function should leave with
     * KErrNotSupported. The position of the source buffer should be checked
     * by calling the source buffer's Position() member which indicates the
     * current source read position in bytes. The codec should start
     * processing from the current source buffer read position. The position
     * of the destination buffer should be checked by
     * calling the destination buffer's Position() method which indicates the
     * current destination write position in bytes. The codec should start
     * writing to the destination buffer at the current destination buffer
     * write position.
     * This is a virtual function that each derived class must implement.
     * @see enum TCodecProcessResult
     * @param  aSource
     *         The source buffer containing data to encode or decode.
     * @param  aDestination
     *         The destination buffer to hold the data after encoding or
     *         decoding.
     * @return The result of the processing.
     * @pre    The function ConfigureL() should have been called.
     */
    virtual TCodecProcessResult ProcessL( const CMMFBuffer& aSource,
                                                CMMFBuffer& aDestination );

private:

    /**
     *  Default Constructor
     */
	CAriAmrNbEncMmfCodec();

	/**
     *  Symbian 2nd phase constructor .
     */
	void ConstructL();

	/**
     * Update the result with result status, source bytes consumed
     * and destination bytes added.
     * @param   aStatus
     *          status of the result like EProcessComplete
     * @param   aSrcBytesConsumed
     *          total bytes consumed from the source buffer
     * @param   aDstBytesAdded
     *          total bytes added to the destination buffer
     * @return  result of the processing
     */
    TCodecProcessResult Result(
            TCodecProcessResult::TCodecProcessResultStatus aStatus,
            TInt aSrcBytesConsumed,TInt aDstBytesAdded );

    /**
     * Copy the bytes from internal output buffer to destination buffer
     * @param   aDst
     *          pointer to the destination buffer
     * @param   aDstBytesConsumed
     *          total bytes added to the destination buffer
     * @return  number of bytes copied to the destination buffer.
     */
    TInt CopyToDstBuffer( CMMFDataBuffer* aDst, TInt& aDstBytesConsumed );

    /**
     * Copy the bytes from the source buffer to the internal input burrer
     * @param   aSrc
     *          pointer to the source buffer
     * @param   aSrcBytesConsumed
     *          total bytes consumed from the source buffer
     * @return  number bytes copied from the source buffer
     */
    TInt CopyFromSrcBuffer(const CMMFDataBuffer* aSrc,
                        TInt& aSrcBytesConsumed );
    /**
     * Shifts the data in the input internal buffer to start position
     * @param   aFromPos
     *          position from where data has to shift
     * @param   aToPos
     *          position to where data has to shift
     */
    void ShiftData( TInt aFromPos, TInt aToPos );

private: //Data

	// Handle to wrapper class
    CAriAmrNbEncWrapper*    iCodec;

    TBool 			        iConfigured;
    TAmrNbEncParam          iParam;
    TInt 			        iSrclenToProcess;
    TInt			        iInternalInputBufferResidueLen;
    TInt                    iInternalOutputBufferResidueLen;
    TUint8*                 iInternalInputBuffer;
    TUint8*                 iInternalOutputBuffer;
    TInt 			        iInternalOutputBufferPos;

    };

#endif /* ARIAMRNBENCMMFCODEC_H */
